Type-writing machine.



I. C. DUANE.

TYPEWRITING MACHINE.

APPLICATION FILED FEB. 27. 1911.

1 gmh Patented Nov. 27, 191?.

2 SHEETSSHEET .l. C. DUANE. TYPE WRITING MACHINE. APPLICATION FILED FE6.27. 1917.

Pmm Nov. 2?, $9122 2 fiHEETS-SHEET 2.

WET

as an FIN image a o s, banana-roan,ico mncrrcn'r, ASSIGNOR 'rc UNDER'WOOD rvrnwai'rnn i :oonrnnv, or nwvo'ax, 1v, 1., a conroaarron or DELAWARE.

citizen of the United States, 1 residing in Writing Machines, 7

' is a s ecification.

I 1 This invention relatestoan jimprovement 10.

in typewriting machines and more espe- Lci'ally to a combined work-holder and ribbon guard,coiiperating with the line-gage to maintain awwork-member in proper, posigers, there is provided; a pair of guards tion on theplaten. I. 15

- very bottom edge-of the work-sheet or card when writing in lower-case, the line-gage fWhen it is desired to write almost on' the assists-in holding the work-member on the platen.- If'the platen should be shifted to upper-essay however, where the lines a does not moveto upper-case position 0- t e platen, the lower'edge of the work-member 'sometimesmoves away from the platen, and inreturning to lower-case;positionhcatches ion the line-gage andalso on the casings for theiribbon spoolsi Torovercome this difliculty, there is provfidedajholder which comprises a pair of fingerstprojecting considerably above the top edge of the line-gage, which corresponds substantially with, the

baseof the line oftypewriting. These fin-' .gers are locatedon opposite sides-of. the

printingrpoint,cso asnot to interfere with ,the striking of'the type-bars, and engage the work-member at-asuch a point as will I hold: the fsamefsnug on the platen even to "the last line of writing. They also act to maintain stifi cards insnug position on the plat shat. a .Conn'e'cted: withthesupport for the finwhoseupper, limits of reach are considerably above the top edgecof the lineage, and thus abovethe typewritten line. 7 hey extend to such aposition as to deflectthe "lower edge ofthe 'work-sheetwhen moving from upperto:lower-case; osition, so that 1 it will. not catch onj'the icaslngs for theribbon spoolsJ-These guards are yleldingly mounted, so thatas the; sides of the carriage pass over them, theycare depressed out of the way, as it is; desired, that their range v i "Specification of Letters Patent. v Patentgdl Now, 2?, 3191? v -i aiamaa February 27,1917. Serial to. 151,156.,

I shallbe above the lowest projection of the sides of the carriage in whose path" they lie.

Other features and advantages will hereinafter appear;

In the accompanying drawings,

, Figure 1 is a skeleton perspective view showing the device in its normal position with the carriage about midway of its travel;

Fig. 2 is a vertical section taken from front to rear, with parts omitted to sim lify the showing. In this view the platen is in lower-case position.

c Fig. 3 isan enlarged detail view in front elevation, with parts broken away to show the underl in structure. The carriage is shown as avlng traveled considerably toward its extreme right-handposition, showing in. full-lines, the left-hand guard depressed to clear the frame. of the carriage,

and in dotted-lines, the position the ard normally occupies when the carriage raine is out of the way. 7

Fig.4 is an enlarged top plan view, showing. the relation of the guards to the casings I .4, so as to swing type-bars 5 up rearwardly against the front side of the platen 6 mounted to rotate on a carriage 7. The carriage :17 :has the usual step-by -step travel under the control of an escapement mechanism indieated in general at 8.

This escapement mechanism includes a rack 9 mounted on the carriage 7, engaging a pinion 10, con- ;ti'olled inits rotation by an escapement 'wheel 11, which in turn is controlled by a pair of dogs 12. The dogs 12 are rocked back and forth at each actuation of a key,

1 by means of a universal frame 13, which is en agedby heels 14:, one of which is prcvi ed on 'each of thetype-barsfi.

The type-bars ,5 are provided with, two

sets of charactersl5 and 16, corresponding I to upper and lower-case writing. Normally, the platen 6 is 1n a position to write lowercase characters, it being raised by shitt keys .17 to upper caseposition when it will cooperate with the upper-case characters 15.

3i platen 6, there is provided a'line-gage' 30.

For this purpose, the laten 6 is mounted on an inner carriage or p laten frame 18, which is supported on the main carriage 7 by pivoted arms 19. The inner carriage or platen frame 18 is also rovided with rollers 20 which ride on a Slllft rail 21. The shift rail 21 is mounted on a rocking shift frame 22, which is operated from either of two shift keys 17. The said keys when depressed, rock levers 23 to swing arms 24: carried thereby forward, and thus rock the shift frame22, which in turn raises the platen 6.

The type-bars 5 do not strike the worksheet indicated at 25 directly, but are guided to strike a carbon ribbon 26 which transfers an impression to the work-sheet 25 correspondmg to the particular type key depressed. The ribbon 26 is threa ed through the usual vibrator 27, and unwinds from one and winds on the other of a pair of spools 28, depending upon a direction of travel of the ribbon. When the spoolcompletelv unwinds the direction of drive is reversed and the ribbon .is wound from the full spool to theempty spool. The spools 28 are mounted to rotate in casings 29 which assist in guiding the ribbon, and are protected to a certain extent from dust;-

For the purpose of accurately positioning the work-sheet or other-work members on the Theline-gage 30 includes a pair of wing scales 31 mounted by means of hinge brack however, permit them to leld, so as not to i interfere with the case-s ift movement of the platen or with the travel of the carriagefbesi es allowing for difi'erent thicknesses 0 work members on the platen. Thefact that the line-gage engages the platen,'simply enables it to assist the usual feed rollers 35 written on after it has passed beyond the control of the feed rollers 35. In such a case, when the platen is shifted to its upper-case position, the lower ed e of the'work-sheet might escape from the inegage 30, and when the platen is returned to lower-case position, it mightcome on the out side of the. gage 30and perha s catch on the casings 29 of the ribbon spoo To avoid "fthis, deflecting and holding fingers 36 are provided between the wing scales and guards 37 provided at the sides of the wing scales.

- The fingers 36 are mounted or formed on a" support 38 shown and comprised in the form of a cross-piece 39, having angular reaches 40 inserted in slots provided in the heads of pins 51. The pins 51 are reduced at their the guar means? lower ends to engage sockets provided in the, segment 33.

ss The fingers 36 are spoonshaped, so as to present curved surfaces to the platen and thus to the work-sheet. They" also are deflected inwardly toward the platen of travel of the platen. The guards 37 are pivotally mounted on extensions 52 at theirinner ends, by means of pivot screws 53. The guards have lugs 54; projecting inwardly behind their pivot points to engage the heads 50 of the pins'51, so as-to deterin these normal positions by springs 55,

which engage arms 56 on the guards at one.

end, and brackets 57 on the extensions 52 at their other end.

mine their normal position.- They are held The guards curve upwardly, so thatgthe: highest point of their top edges reach con-- siderably behind the'top edgeof the linegage 30. From these points they curve out-1 wardly and downwardly in juxtaposition with respect to the ribbon spool cas1ngs129. The guards are formed in the manner of in Fig. 3. In this-figu sickles to enable them to be easily cammed down out of. the way, when the carriage frame travels over them, as indicated at 60 re, it will be seen that the dotted-line osition' shows" the normal raised position 0 one of the guards which is considerably above" the line of travel pf the loo lower edge of the carriage frame, and that I the guard can be depressed with the passage of the carriage frame 1n either direction without interference.

It will thus be seenthat the fingers 36 will assist" in guiding the ordinary worksheet and will maintain a stiff work-member engagement with the ribbon spoqlmg I 11118-29;

ariations may to within the scope of the invention, and j'portions of the improvements may be. used without 'others.

' Having thus. described M myz 'invention, I

claim: A 1. The combination with-a carriage having ends and aplaten, of a type a'ction 00-. operating with said platen, "a'ribbon' inter-- posed between said type-action and said platen, spools for said ribbon, casings upon the machine frame for said spools, and guards mounted on the machine frame to prevent contact of work-members carried by said platen with said casings, said guards in the path of travel of said carriage ends,

and being mounted to yield when engaged by said carriage ends, to permit the travel of the carriage.

2. The combination with a traveling carriage, of a platen carried by said carriage, type-actions cooperating with said platen, a ribbon interposed between'said type-actions and said platen, spools for said ribbon, casings for said spools, and guards for said spool casings preventing the engagement of said casings with a work-sheet carried by said carriage, said guards normally lying in the path of travel of the said carriage, and being pivoted so as to be forced aside by the carriage.

3. The combination with a carriage, of an up-and-down shiftable platen carried by said carriage, a stationary line-gage for said platen, type-actions cooperating with said platen, a ribbon interposed between said type-actions and said platen, separated spools for said ribbon, casings for said spools, said line-gage mounted between said spools, and a pair of guards above the top edge of said line-gage and extending beyond the ends thereof into proximity with the casings of said spools, in position to guide the lower edge of the'work-sheetaway from said casings and toward said platen at the downward shift of the latter.

4. The combination with a typewriter frame, of a carriage traveling on said frame, a platen mounted on said carriage, a ribbon mechanism cooperating with said platen in eluding casings in close juxtaposition to the line of writing on said platen, and a pair of guards pivoted at their inner ends centrally of said frame, and extending at their outer swinging ends in intervening position between said casings and said platen, so as to act as deflectors preventing an engagement of a work-member carried by said platen with said casings.

5. The combination with a traveling carriage, of a platen mounted on said carriage. ribbon mechanism cooperating with said platen including casings in close juxtaposition to the printing line of said platen, and a pair of sickle-shaped guards bending in toward their outer ends to a position between said casings and said platen, and yieldingly mounted, so that when their curved surfaces are engaged by said carriage, they will yield to permit free passage of said carriage.

6. The combination with a platen, of a combined work-member holder and guard cooperating with said platen comprising a body portion having a pair of fingers projecting upwardly therefrom, and a pair of guides pivotally mounted on said body portion and bending arcuately toward the end of said platen when in a central position.

7. Theeombination with a type segment of a pair of pins mounted in said segment having heads with sockets therein, a strip of metal having a cross-piece with a pair of fingers projecting therefrom, reaches bent with respect to said cross-piece and extending into said sockets, extensions projecting from said reaches in opposite directions, and a pair of guards projecting outwardly from said extensions and being pivotally mounted thereon.

8. The combination with a type segment, of a pair of pins mounted in said segment having heads with sockets therein, a strip of metal having a cross-piece with a pair of fingers projecting therefrom, reaches bent with respect to said cross-piece and extending into said sockets, extensions projecting from said reaches in op osite directions, and a pair of guards projecting outwardly from said extensions and being pivotally mounted thereon, said guards having lugs thereon engaging the heads of said pins. arms on said guards and springs connecting said arms and said extensions.

9. The combination with a platen, of a' pair of card fingers for said platen, a typebar segment, and supporting means for said card fingers comprising a cross-strip integral with said card fingers a pair of pins mounted in said segment and having grooved heads and reaches projecting from said strip extending into said grooved heads.

10. The combination with a platen of a line-gage for said platen having its upper edge normally in engagement with said platen, and a pair of guards pivotally mounted at their inner ends below the upper edges of said line-gage and curving upwardly, bringing the upper edges thereof considerably above the upper edges of said line-gage where the upper edges of said guards curve downwardly to points considerably below the upper edges of said linegage and beyond the outer ends thereof, said guards also warping from a point intermediate their ends gradually closer to said platen toward their outer ends.

JOHN C. DUANE.

Witnesses W. M. BYORKMAN, FRANK A. C003. 

